ProcedureMeta

common_procedure::local

Struct ProcedureMeta 

Source 
pub(crate) struct ProcedureMeta {
Show 13 fields
    id: ProcedureId,
    type_name: String,
    parent_id: Option<ProcedureId>,
    child_notify: Notify,
    lock_key: LockKey,
    poison_keys: PoisonKeys,
    state_sender: Sender<ProcedureState>,
    state_receiver: Receiver<ProcedureState>,
    children: Mutex<Vec<ProcedureId>>,
    start_time_ms: AtomicI64,
    end_time_ms: AtomicI64,
    event_recorder: Option<EventRecorderRef>,
    user_metadata: Option<UserMetadata>,

}
Expand description

Shared metadata of a procedure.

§Note

[Notify] is not a condition variable, we can’t guarantee the waiters are notified if they didn’t call notified() before we signal the notify. So we

  1. use dedicated notify for each condition, such as waiting for a lock, waiting for children;
  2. always use notify_one and ensure there are only one waiter.

Fields§

§id: ProcedureId

Id of this procedure.

§type_name: String

Type name of this procedure.

§parent_id: Option<ProcedureId>

Parent procedure id.

§child_notify: Notify

Notify to wait for subprocedures.

§lock_key: LockKey

Lock required by this procedure.

§poison_keys: PoisonKeys

Poison keys that may cause this procedure to become poisoned during execution.

§state_sender: Sender<ProcedureState>

Sender to notify the procedure state.

§state_receiver: Receiver<ProcedureState>

Receiver to watch the procedure state.

§children: Mutex<Vec<ProcedureId>>

Id of child procedures.

§start_time_ms: AtomicI64

Start execution time of this procedure.

§end_time_ms: AtomicI64

End execution time of this procedure.

§event_recorder: Option<EventRecorderRef>

Event recorder.

§user_metadata: Option<UserMetadata>

The user metadata of the procedure. It’s generated by [Procedure::user_metadata].

Implementations§

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impl ProcedureMeta

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fn new( id: ProcedureId, procedure_state: ProcedureState, parent_id: Option<ProcedureId>, lock_key: LockKey, poison_keys: PoisonKeys, type_name: &str, event_recorder: Option<EventRecorderRef>, user_metadata: Option<UserMetadata>, ) -> ProcedureMeta

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fn state(&self) -> ProcedureState

Returns current ProcedureState.

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fn set_state(&self, state: ProcedureState)

Update current ProcedureState.

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fn push_child(&self, procedure_id: ProcedureId)

Push procedure_id of the subprocedure to the metadata.

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fn list_children(&self, buffer: &mut Vec<ProcedureId>)

Append subprocedures to given buffer.

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fn num_children(&self) -> usize

Returns the number of subprocedures.

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fn set_start_time_ms(&self)

update the start time of the procedure.

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fn set_end_time_ms(&self)

update the end time of the procedure.

Trait Implementations§

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impl Debug for ProcedureMeta

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more

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